21177369

素因数分解:

$3^4\times {\mathrm{53}}^1\times {\mathrm{4933}}^1$

素因数の和:4998

約数の個数: 20

約数和(自身を含む): 32238756

約数和(自身を除く): 11061387

約数列:

[1, 3, 9, 27, 53, 81, 159, 477, 1431, 4293, 4933, 14799, 44397, 133191, 261449, 399573, 784347, 2353041, 7059123, 21177369]

約数ペア:

[(1, 21177369), (3, 7059123), (9, 2353041), (27, 784347), (53, 399573), (81, 261449), (159, 133191), (477, 44397), (1431, 14799), (4293, 4933)]